General Size: The plastic dome of our mop head is 6.3 inches in diameter (round). Fits most common mops (but not compatible with all disc mops, please read size info before purchasing!!!) Not compatible with Leifheit Clean Twist Disc Mop!!! This item has strong detergency, removes stubborn dirt, grime and grease without leaving water marks for a tidy home. Made of microfiber fabric, washable and reusable, it has strong water absorption water, dries quickly and is durable. Package Contents: Contains 4 mop heads for easy cleaning and drying. Quick installation and simple operation. This replacement mop head is a good helper for floor, glass and car cleaning. Wide Use: The microfiber mop heads are ideal for dry water use. Suitable for cleaning, polishing and waxing smooth surfaces such as wooden floors, tiles, marbles, etc.